diff --git a/engine.c b/engine.c
--- a/engine.c
+++ b/engine.c
@@ -227,7 +227,7 @@ static PlayerID GetBestPlayer(PlayerID p
 
 	do {
 		best_hist = -1;
-		best_player = OWNER_SPECTATOR;
+		best_player = PLAYER_SPECTATOR;
 		FOR_ALL_PLAYERS(p) {
 			if (p->is_active && p->block_preview == 0 && !HASBIT(mask, p->index) &&
 					p->old_economy[0].performance_history > best_hist) {
@@ -236,7 +236,7 @@ static PlayerID GetBestPlayer(PlayerID p
 			}
 		}
 
-		if (best_player == OWNER_SPECTATOR) return OWNER_SPECTATOR;
+		if (best_player == PLAYER_SPECTATOR) return PLAYER_SPECTATOR;
 
 		SETBIT(mask, best_player);
 	} while (--pp != 0);
@@ -263,7 +263,7 @@ void EnginesDailyLoop(void)
 			} else if (e->preview_player != 0xFF) {
 				PlayerID best_player = GetBestPlayer(e->preview_player);
 
-				if (best_player == OWNER_SPECTATOR) {
+				if (best_player == PLAYER_SPECTATOR) {
 					e->preview_player = 0xFF;
 					continue;
 				}